# Nixpkgs 25.05 (2025.05/23) {#sec-nixpkgs-release-25.05}

## Highlights {#sec-nixpkgs-release-25.05-highlights}

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- **This release of Nixpkgs requires macOS Big Sur 11.3 or newer, as announced in the 24.11 release notes.**
  We cannot guarantee that packages will continue to work on older versions of macOS.
  Future Nixpkgs releases will only support [macOS versions supported by Apple](https://endoflife.date/macos); this means that **Nixpkgs 25.11 will require macOS Sonoma 14 or newer**.
  Users on old macOS versions should consider upgrading to a supported version (potentially using [OpenCore Legacy Patcher](https://dortania.github.io/OpenCore-Legacy-Patcher/) for old hardware) or installing NixOS.
  If neither of those options are viable and you require new versions of software, [MacPorts](https://www.macports.org/) supports versions back to Mac OS X Snow Leopard 10.6.

- The default kernel package has been updated from 6.6 to 6.12. All supported kernels remain available.

- GCC has been updated from GCC 13 to GCC 14.
  This introduces some backwards‐incompatible changes; see the [upstream porting guide](https://gcc.gnu.org/gcc-14/porting_to.html) for details.

- The default GHC version has been updated from 9.6 to 9.8.
  `haskellPackages` also uses Stackage LTS 23 (instead of LTS 22) as a baseline.
  We aim to remove the old GHC versions 8.10, 9.0 and 9.2 in the next release in accordance with [the new GHC deprecation policy](https://discourse.nixos.org/t/nixpkgs-ghc-deprecation-policy-user-feedback-necessary/64153).

- LLVM has been updated from LLVM 16 (on Darwin) and LLVM 18 (on other platforms) to LLVM 19.
  This introduces some backwards‐incompatible changes; see the [upstream release notes](https://releases.llvm.org/) for details.

- The Factor programming language packages were reworked. `factor-lang-scope` is now named `factorPackages` and provides a `buildFactorApplication` function to deploy Factor programs as binaries. It has also received proper documentation in the Nixpkgs manual.

- The packaging of Mesa graphics drivers has been significantly reworked, in particular:
  - Applications linked against different Mesa versions than installed on the system should now work correctly going forward (however, applications against older Mesa, e.g. from Nixpkgs releases before 25.05, remain broken)
  - Packages that used to depend on Mesa for libgbm or libdri should use `libgbm` or `dri-pkgconfig-stub` as inputs, respectively

- GNU Taler has been updated to version 1.0.
  This marks a significant milestone as the GNU Taler payment system is now available in Swiss Francs for individuals and businesses in Switzerland.
  For more details, see the [upstream release notes](https://www.taler.net/en/news/2025-01.html).

- OpenSSH has been updated from 9.9p2 to 10.0p2, dropping support for DSA keys and adding a new `ssh-auth` binary to handle user authentication in a different address space from unauthenticated sessions. See the [full changelog](https://www.openwall.com/lists/oss-security/2025/04/09/1) for more details.

- Emacs has been updated to 30.1.
  This introduces some backwards‐incompatible changes; see the NEWS for details.
  NEWS can been viewed from Emacs by typing `C-h n`, or by clicking `Help->Emacs News` from the menu bar.
  It can also be browsed [online](https://git.savannah.gnu.org/cgit/emacs.git/tree/etc/NEWS?h=emacs-30).

- The `intel` video driver for X.org (from the xf86-video-intel package, which was previously removed because it was non-functional) has been fixed and the driver has been re-introduced.

- The default openexr version has been updated to 3.2.4.

- The default PHP version has been updated to 8.4.

- The default Erlang OTP version has been updated to 27.

- The default Elixir version has been updated to 1.18.

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